–
N
S
+
Electric energy
source
Electric motor
Mechanical
transmission
298
Alternative Fuels for Transportation
Figure 10.1
Block diagram of a basic electric vehicle drivetrain.
Figure 10.2
Schematic of working principle of DC motor. (From http://www.ncert.nic.in/html/learning_
basket/electricity/animations/dc-motor.html.)
when a coil carrying current is held in a magnetic field, it experiences a
torque that rotates the coil. Figure 1 0.2 shows the schematic of DC motor
working principle.
The motor works on the principle of Flemming’s left-hand rule. One side of
the coil experiences a force directed inward and perpendicular to the plane
of the coil and the other side experiences it in the outward direction and
perpendicular to the plane of the coil. These two forces being equal, unlike
and parallel form a couple, which rotates the armature coil in a counterclockwise direction. After the coil rotates through 180° the direction of the
current is reversed in both sides of coil and so the forces are experienced by
N
S
+
Electric energy
source
Electric motor
Mechanical
transmission
298
Alternative Fuels for Transportation
Figure 10.1
Block diagram of a basic electric vehicle drivetrain.
Figure 10.2
Schematic of working principle of DC motor. (From http://www.ncert.nic.in/html/learning_
basket/electricity/animations/dc-motor.html.)
when a coil carrying current is held in a magnetic field, it experiences a
torque that rotates the coil. Figure 1 0.2 shows the schematic of DC motor
working principle.
The motor works on the principle of Flemming’s left-hand rule. One side of
the coil experiences a force directed inward and perpendicular to the plane
of the coil and the other side experiences it in the outward direction and
perpendicular to the plane of the coil. These two forces being equal, unlike
and parallel form a couple, which rotates the armature coil in a counterclockwise direction. After the coil rotates through 180° the direction of the
current is reversed in both sides of coil and so the forces are experienced by